When is he committed and loyal to you?

In my experience I talked to a man but I found out he cheated all the time and was very open about it to me. As if it didn't hurt him and thought he could normalize it.
I just don't get that kind of men think he can commit and be loyal to someone.

That's why I ask this question.
When do you know for sure when a man you like is committed and loyal to you?
When is he committed and loyal to you?
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